Postage stamp label



FIG. 1 is a front view of a postage stamp label containing an image depicting a portion of a globe, according to an embodiment of my design; and,

FIG. 2 is a front view of a postage stamp label containing an image depicting a portion of a globe, according to another embodiment of my design.

The broken line showing of parts of the drawings is included for the purpose of illustrating use, boundaries, and environment and forms no part of the claimed design. 

The ornamental design for a postage stamp label, as shown and described. 